3644685 has 48 divisors (see below), whose sum is σ = 7113600. Its totient is φ = 1710720.

The previous prime is 3644659. The next prime is 3644699. The reversal of 3644685 is 5864463.

3644685 is a `hidden beast` number, since 3 + 644 + 6 + 8 + 5 = 666.

It is not a de Polignac number, because 3644685 - 2⁵ = 3644653 is a prime.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 18216 + ... + 18414.

It is an arithmetic number, because the mean of its divisors is an integer number (148200).

Almost surely, 2^3644685 is an apocalyptic number.

It is an amenable number.

3644685 is a deficient number, since it is larger than the sum of its proper divisors (3468915).

3644685 is a wasteful number, since it uses less digits than its factorization.

3644685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258 (or 255 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

The square root of 3644685 is about 1909.1058116301. The cubic root of 3644685 is about 153.8934018022.

The spelling of 3644685 in words is "three million, six hundred forty-four thousand, six hundred eighty-five".